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Finding the Fourth Proportional to 667,649.47, 921,356.38 and 361,727.97

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Solution

The fourth proportional to 667,649.47, 921,356.38 and 361,727.97 is: 499,184.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,649.47 : 921,356.38 = 361,727.97 : x
  2. Step 2: Convert to fraction form
    667,649.47/921,356.38 = 361,727.97/x
  3. Step 3: Cross multiply
    667,649.47x = 921,356.38 × 361,727.97
  4. Step 4: Simplify right side
    667,649.47x = 333,280,372,983.95
  5. Step 5: Solve for x
    x = 333,280,372,983.95/667,649.47
  6. Step 6: Final answer
    x = 499,184.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.